package java_常用api;

public class API_4_基本数据类型 {
    public static void main(String[] args) {
        Integer dx1 = new Integer(100);
        System.out.println(dx1);//过期

        Integer dx2 = Integer.valueOf("12");
        Integer dx3 = Integer.valueOf(1000);

        System.out.println(dx2+100);
        System.out.println(dx3);
    }
}
